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MyTorch – Minimalist autograd in 450 lines of Python

100 points1 monthgithub.com
brandonpelfrey1 month ago

Having written a slightly more involved version of this recently myself I think you did a great job of keeping this compact while still readable. This style of library requires some design for sure.

Supporting higher order derivatives was also something I considered, but it’s basically never needed in production models from what I’ve seen.

iguana20001 month ago

Thanks! I agree about the style

jerkstate1 month ago

Karpathy’s micrograd did it first (and better); start here: https://karpathy.ai/zero-to-hero.html

alkh1 month ago

Imho, we should let people experiment as much as they want. Having more examples is better than less. Still, thanks for the link for the course, this is a top-notch one

iguana20001 month ago

Karpathy's material is excellent! This was a project I made for fun, and hopefully provides a different perspective on how this can look

jerkstate1 month ago

I'm very sorry, I should have phrased my original post in a kinder, less dismissive way, and kudos to you for not reacting badly to my rudeness. It is a cool repo and a great accomplishment. Implementing autograd is great as a learning exercise, but my opinion is that you're not going to get the performance or functionality of one of the large, mainstream autograd libraries. Karpathy, for example, throws away micrograd after implementing it and uses pytorch in his later exercises. So it's great that you did this, but for others to learn how autograd works, Karpathy is usually a better route, because the concepts are built up one by one and explained thoroughly.

iguana20001 month ago

No worries, you're good, yes Karpathy is for sure the better route

richard_chase1 month ago

Harsh.

whattheheckheck1 month ago

Why is it better

forgotpwd161 month ago

Cleaner, more straightforward, more compact code, and considered complete in its scope (i.e. implement backpropagation with a PyTorch-y API and train a neural network with it). MyTorch appears to be an author's self-experiment without concrete vision/plan. This is better for author but worse for outsiders/readers.

P.S. Course goes far beyond micrograd, to makemore (transfomers), minbpe (tokenization), and nanoGPT (LLM training/loading).

tfsh1 month ago

Because it's an acclaimed, often cited course by a preeminent AI Researcher (and founding member of OAI) rather than four undocumented python files.

gregjw1 month ago

it being acclaimed is a poor measure of success, theres always room for improvement, how about some objective comparisons?

nurettin1 month ago

Objective measures like branch depth, execution speed, memory use and correctness of the results be damned.

CamperBob21 month ago

Karpathy's implementation is explicitly for teaching purposes. It's meant to be taken in alongside his videos, which are pretty awesome.

geremiiah1 month ago

Ironically the reason Karpathy's is better is because he livecoded it and I can be sure it's not some LLM vomit. Unfortunately, we are now indundated with newbies posting their projects/tutorials/guides in the hopes that doing so will catch the eye of a recuiter and land them a high paying AI job. That's not so bad in itself except for the fact that most of these people are completely clueless and posting AI slop.

iguana20001 month ago

Haha, couldn't agree with you more. This, however, isn't AI slop. You can see in the commit history that this is from 3 years ago

khushiyant1 month ago

Better readme would be way to go

CamperBob21 month ago

In iguana2000's defense, the code is highly self-documenting.

It arguably reads cleaner than Karpathy's in some respects, as he occasionally gets a little ahead of his students with his '1337 Python skillz.

jjzkkj1 month ago

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